What is a mineral that occurs in a quantity that is economically worthwhile to mine?

Which age groups shows the graestest diferrence between males and females

Religious conflict in northern ireland started with a) cultural differences resulting from viking invasions around 800 b) england’s split from the catholic church in the 1500s c) rebellions in ireland between 1916 and 1921 d) the norman invasion of england in 1066

The english language is part of which language family? a. alatic b. dravidan c. indo-european d. khoisan